I think that there is market for the implants where UID can be changed because a lot people want us them not only at home but as well in work place or at uni. I did approach IT department and they are refused to use my old implant for any authentication.

Are there any plans to produce the UID changeable implant?

Maybe it will be worth have a vote on this forum to see how many people would buy one.

We've toyed with the idea but when we periodically check with our suppliers we are unable to locate small batches of the "Chinese magic backdoor" chip (a knockoff of the Mifare S50 1K). If we eventually find a source and can arrange it with our factory, we will make them.. but it's not likely.